[Xen-changelog] [xen-unstable] libxc: convert mca interface over to hypercall buffers

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1287756891 -3600
# Node ID 480197ff0be2c9df3bff187e9aba35d3f8d95789
# Parent  001e48a6f088cf023a0d8dc7d604c49264189019
libxc: convert mca interface over to hypercall buffers

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Signed-off-by: Ian Jackson <ian.jackson.citrix.com>
---
 tools/libxc/xc_misc.c |   17 +++++++++--------
 1 files changed, 9 insertions(+), 8 deletions(-)

diff -r 001e48a6f088 -r 480197ff0be2 tools/libxc/xc_misc.c
--- a/tools/libxc/xc_misc.c     Fri Oct 22 15:14:51 2010 +0100
+++ b/tools/libxc/xc_misc.c     Fri Oct 22 15:14:51 2010 +0100
@@ -167,18 +167,19 @@ int xc_mca_op(xc_interface *xch, struct 
 {
     int ret = 0;
     DECLARE_HYPERCALL;
-
+    DECLARE_HYPERCALL_BOUNCE(mc, sizeof(*mc), XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
+
+    if ( xc_hypercall_bounce_pre(xch, mc) )
+    {
+        PERROR("Could not bounce xen_mc memory buffer");
+        return -1;
+    }
     mc->interface_version = XEN_MCA_INTERFACE_VERSION;
-    if ( lock_pages(xch, mc, sizeof(*mc)) )
-    {
-        PERROR("Could not lock xen_mc memory");
-        return -EINVAL;
-    }
 
     hypercall.op = __HYPERVISOR_mca;
-    hypercall.arg[0] = (unsigned long)mc;
+    hypercall.arg[0] = HYPERCALL_BUFFER_AS_ARG(mc);
     ret = do_xen_hypercall(xch, &hypercall);
-    unlock_pages(xch, mc, sizeof(*mc));
+    xc_hypercall_bounce_post(xch, mc);
     return ret;
 }
 #endif

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